#include "apue.h"


int 
main(void) {
	struct stat statbuf;
	
	if (stat("foo", &statbuf) < 0) {
		err_sys("stat error for foo");
	}

	if (chmod("foo", (statbuf.st_mode & ~S_IXGRP) | S_ISGID) < 0) {
		err_sys("chmod erro for foo");
	}

	if (chmod("bar", S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) {
		err_sys("chmod error for bar");
	}

	exit(0);

}
